Summary
diameter in minecraft:teleport_randomly consume effect (specified with consumable item component's on_consume_effects is ignored. No matter which value is provided, the game always uses the default of 16 blocks.

Steps to Reproduce

1. Run the following command:

   /give @s stick[minecraft:consumable={on_consume_effects:[{type:"minecraft:teleport_randomly",diameter:1.0f}]}] 64
   

2. Eat the stick

Expected Result
You teleport within 1 block radius.

Actual Result
You teleport within 16 block radius.